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freeze plugs in the B

Farmall B & BN Tractors, 1939-1947
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brichter
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freeze plugs in the B

Postby brichter » Fri Nov 13, 2015 8:09 pm

Has anyone on here changed out freeze plugs on a Model B? If I remove the gas tank can I get to it then with breaking the tractor? Thanks for any info you can give me on this.
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Re: freeze plugs in the B

Postby Eugene » Fri Nov 13, 2015 9:04 pm

Pretty sure you need to split the tractor to get to the freeze plug(s) on the back side of the block.

It's been 30 plus years since I overhauled a B. Had to think back. I replaced the freeze plug(s) when I split the tractor for other work.
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Re: freeze plugs in the B

Postby Mr E » Fri Nov 13, 2015 9:36 pm

Hey BR, no freezing weather around here lately! What's with the freeze plugs? :lost:
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Re: freeze plugs in the B

Postby Jim Becker » Fri Nov 13, 2015 9:55 pm

Split the tractor behind the engine. Pull the clutch off then the flywheel. There are 2 expansion plugs. The larger one is in the water jacket and is the one that needs replacing. The smaller one is at the end of the camshaft and has oil behind it.

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Re: freeze plugs in the B

Postby brichter » Fri Feb 05, 2016 9:14 pm

Mr. Becker,

as usual, you were spot on. The freeze plug was pushed out on one side. However the freeze had put a crack in the usual spot behind the carb. just a small one that allowed weeping so we are going to weld it up. Also the clutch needed attention so while we are in here we are redoing the clutch, pressure plate, and throwout bearing. All this just for a water leak.
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Re: freeze plugs in the B

Postby Mr E » Fri Feb 05, 2016 9:46 pm

brichter wrote:Mr. Becker,

as usual, you were spot on. The freeze plug was pushed out on one side. However the freeze had put a crack in the usual spot behind the carb. just a small one that allowed weeping so we are going to weld it up. Also the clutch needed attention so while we are in here we are redoing the clutch, pressure plate, and throwout bearing. All this just for a water leak.


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Re: freeze plugs in the B

Postby havoc1482 » Wed Feb 10, 2016 7:37 pm

Mr E wrote:Hey BR, no freezing weather around here lately! What's with the freeze plugs? :lost:



Freeze plugs are the biggest misnomer in automotive mechanics. They are just the areas left open so casting sand could be removed at the foundry. They have nothing to do with preventing cracks due to frozen coolant.
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Re: freeze plugs in the B

Postby Scrivet » Sun Feb 14, 2016 10:04 am

havoc1482 wrote:.........Freeze plugs are the biggest misnomer in automotive mechanics. ...........
Easy outs would come in a close second.

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Re: freeze plugs in the B

Postby Jim Becker » Sun Feb 14, 2016 12:04 pm

Scrivet wrote:
havoc1482 wrote:.........Freeze plugs are the biggest misnomer in automotive mechanics. ...........
Easy outs would come in a close second.

I'd rank them the other way around. Once in a while a freeze plug works.


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